The emotional health of college freshmen — who feel buffeted by the recession and stressed by the pressures of high school — has declined to the lowest level since an annual survey of incoming students started collecting data 25 years ago.

In the survey, “The American Freshman: National Norms Fall 2010,” involving more than 200,000 incoming full-time students at four-year colleges, the percentage of students rating themselves as “below average” in emotional health rose. Meanwhile, the percentage of students who said their emotional health was above average fell to 52 percent. It was 64 percent in 1985.

Every year, women had a less positive view of their emotional health than men, and that gap has widened.